Firstly, welcome to the forum!
Secondly congratulations on your new pet.. but I have to agree with geckoguy - you really should have researched and researched before buying the ig; the number one cause of these animals being neglected or mistreated or becoming ill is because their owners haven't properly researched them. Also never rely on what a pet shop tells you - they rarely seem to give out the correct advice and instead spend all of the energy on trying to get you to shell out the most amount of money.
BUT.. good on you for coming to us to try and get the right advice about your ig; you are being responsible and caring and you obviously already love the ig, and by asking for advice on here you are making sure that you will look after it as well as it deserves to be.
One more thing before I actually give advice

... welcome to slavery! You are not the owner of the ig, it is the owner of you!
Ok, I'm not an expert on igs; there are other people on this forum who can give you better advice than I on their care, but having recently co-written an article about UV lighting I can tell you that you need to replace that UV bulb now!! .. a reptiglo 2.0 will not provide the amount of UVB that is required from an iguana. I would eventually recomment that you get a megaray - see
http://www.reptileuv.com - but you will need a much larger enclosure for the ig before you invest in this bulb as it needs to be at least 12" away from the animal and boots out a lot of UVB! For now go for something like a reptiglo 5.0 or 8.0, the 2.0 isn't giving him enough UVB to grow properly and healthily.
Secondly, a vet check or a faecal exam would be beneficial, just to make sure that the ig is initially healthy and well. A faecal exam won't cost you much at all and the vet can give you the all clear or give you treatment for any parasites.. whichever, at least then you can be sure that you are starting off with a healthy animal, rather than trying your best for an animal that is unwell from previous care and not knowing about it until it's too late.
I really wish you all the best with your ig, and I'm sure it will have a wonderful home in your care. I think it's really commendable that you are doing your best to put right what the pet shop has done wrong, and I hope you continue to post here and let us know how the little guy gets on..
One last thing (boy I can rant for England!!)

..obviously no one has told you yet, but .. a photo (of yourself and of the ig!) is compulsory when you join here!
